../ dmsp_15_ephemeris_20190428.txt 22-Jun-2023 16:30 109568 dmsp_16_ephemeris_20190428.txt 22-Jun-2023 16:30 109601 dmsp_17_ephemeris_20190428.txt 22-Jun-2023 16:30 109629 dmsp_18_ephemeris_20190428.txt 22-Jun-2023 16:30 109608